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Finding the Fourth Proportional to 400,503.69, 600,813.86 and 120,042.81

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Solution

The fourth proportional to 400,503.69, 600,813.86 and 120,042.81 is: 180,081.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,503.69 : 600,813.86 = 120,042.81 : x
  2. Step 2: Convert to fraction form
    400,503.69/600,813.86 = 120,042.81/x
  3. Step 3: Cross multiply
    400,503.69x = 600,813.86 × 120,042.81
  4. Step 4: Simplify right side
    400,503.69x = 72,123,383,441.13
  5. Step 5: Solve for x
    x = 72,123,383,441.13/400,503.69
  6. Step 6: Final answer
    x = 180,081.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.